Assumption 1 (Markov Condition)  [1]}]
A directed acyclic graph (DAG) \(G(\mathcal {V}, \mathcal {E})\)  and a probability distribution \(P(X_{\mathcal {V}})\)  satisfy the Markov condition if and only if for every variable \(X_i, i \in \mathcal {V}\) , \(X_i\)  is independent of \(X_{\mathcal {V}} \backslash (descendants(X_i) \cup parents(X_i))\)  given \(parents(X_i)\) .

